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ath9k: fix a crash that happens when survey stats are accessed before the interface is brought up for the first time

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SVN-Revision: 23549
This commit is contained in:
Felix Fietkau 2010-10-20 14:01:53 +00:00
parent b79b929210
commit e53a3539e2
1 changed files with 12 additions and 0 deletions
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12
package/mac80211/patches/540-ath9k_fix_survey_crash.patch Normal file
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@ -0,0 +1,12 @@
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -183,6 +183,9 @@ static void ath_update_survey_stats(stru
struct ath_cycle_counters *cc = &common->cc_survey;
unsigned int div = common->clockrate * 1000;
+ if (!ah->curchan)
+ return;
+
if (ah->power_mode == ATH9K_PM_AWAKE)
ath_hw_cycle_counters_update(common);